Corrosion detection sensor device
First Claim
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1. A sensor device comprising:
- a first electrode including a first metallic material, the first metallic material being a metallic material in which either a first passivation film is formed on a surface thereof or the first passivation film present on the surface thereof is lost, in association with changes in an environment of a measurement site;
a second electrode including a second metallic material different from the first metallic material, the second electrode being spaced apart from the first electrode with the first electrode and the second electrode being disposed on a same plane;
an insulating layer configured such that the first electrode and the second electrode are mounted thereon;
a functional element configured to measure a difference in electric potential between the first electrode and the second electrode that changes depending on presence or absence of the first passivation film; and
a sealing part defining an opening such that at least part of the first electrode and at least part of the second electrode are exposed from the opening,the sensor device being disposed inside a concrete structure, the concrete structure including a reinforcing bar disposed parallel to a surface of the concrete structure,the first electrode being formed of a plurality of first sub electrodes, with the plurality of first sub electrodes being arranged in a first direction,the second electrode being formed of a plurality of second sub electrodes, with the plurality of second sub electrodes being arranged in a second direction,the first direction and the second direction being perpendicular to the surface of the concrete structure and the reinforcing bar, andthe sensor device being disposed between the surface of the concrete structure and the reinforcing bar.
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Abstract
A sensor device includes a first electrode, a second electrode and a functional element. The first electrode includes a first metallic material in which either a first passivation film is formed on a surface thereof or the first passivation film present on the surface thereof is lost, in association with changes in an environment of a measurement site. The second electrode includes a second metallic material different from the first metallic material, the second electrode being spaced apart from the first electrode. The functional element is configured to measure a difference in electric potential between the first electrode and the second electrode that changes depending on presence or absence of the first passivation film.
35 Citations
18 Claims
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1. A sensor device comprising:
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a first electrode including a first metallic material, the first metallic material being a metallic material in which either a first passivation film is formed on a surface thereof or the first passivation film present on the surface thereof is lost, in association with changes in an environment of a measurement site; a second electrode including a second metallic material different from the first metallic material, the second electrode being spaced apart from the first electrode with the first electrode and the second electrode being disposed on a same plane; an insulating layer configured such that the first electrode and the second electrode are mounted thereon; a functional element configured to measure a difference in electric potential between the first electrode and the second electrode that changes depending on presence or absence of the first passivation film; and a sealing part defining an opening such that at least part of the first electrode and at least part of the second electrode are exposed from the opening, the sensor device being disposed inside a concrete structure, the concrete structure including a reinforcing bar disposed parallel to a surface of the concrete structure, the first electrode being formed of a plurality of first sub electrodes, with the plurality of first sub electrodes being arranged in a first direction, the second electrode being formed of a plurality of second sub electrodes, with the plurality of second sub electrodes being arranged in a second direction, the first direction and the second direction being perpendicular to the surface of the concrete structure and the reinforcing bar, and the sensor device being disposed between the surface of the concrete structure and the reinforcing bar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A sensor device comprising:
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a substrate; a first electrode provided on the substrate and including a first metallic material, the first metallic material being a metallic material in which either a first passivation film is formed on a surface thereof or the first passivation present on the surface thereof is lost, in association with changes in an environment of a measurement site; a second electrode provided on the substrate and spaced apart from the first electrode with the first electrode and the second electrode being disposed on a same plane, the second electrode including a second metallic material different from the first metallic material; an insulating layer configured such that the first electrode and the second electrode are mounted thereon; a functional element placed on the substrate and configured to measure a difference in electric potential between the first electrode and the second electrode that changes depending on presence or absence of the first passivation film; and a sealing part covering the functional element and defining an opening such that at least part of the first electrode and at least part of the second electrode are exposed from the opening, the sensor device being disposed inside a concrete structure, the concrete structure including a reinforcing bar disposed parallel to a surface of the concrete structure, the first electrode being formed of a plurality of first sub electrodes, with the plurality of first sub electrodes being arranged in a first direction, the second electrode being formed of a plurality of second sub electrodes, with the plurality of second sub electrodes being arranged in a second direction, the first direction and the second direction being perpendicular to the surface of the concrete structure and the reinforcing bar, and the sensor device being disposed between the surface of the concrete structure and the reinforcing bar.
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Specification
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Current AssigneeSeiko Epson Corporation (Seiko Group)
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Original AssigneeSeiko Epson Corporation (Seiko Group)
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InventorsKato, Juri, Miyazawa, Takao
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Primary Examiner(s)Nguyen, Tung X
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Assistant Examiner(s)FREDERIKSEN, DAVID B
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Application NumberUS13/426,956Publication NumberTime in Patent Office1,636 DaysField of Search324/647, 324/649, 324/690, 324/691, 324/693, 324/700, 324/713, 324/718, 324/71.1US Class Current1/1CPC Class CodesG01N 17/02 Electrochemical measuring s...
